A pressure measuring device is disclosed that includes a housing, a pressure measuring cell, evaluation electronics for processing measurement signals generated by the pressure measuring cell, a plug connection formed at the housing for transmitting the processed measurement signals to an external receiving unit, and an air passage which enables pressure compensation between the interior of the housing and the exterior of the housing. The plug connection includes a cylindrical sleeve and an insert part disposed therein, wherein the air passage is formed as a two-part barrier having a first liquid barrier formed as a duct system from the interior of the housing via the plug connection and a second liquid barrier having a liquid-repellent diaphragm and disposed in an area within the duct system, and wherein the insert part has a first recess into which the diaphragm is inserted. The insert part has a second recess, which is arranged at a distance from the first recess and in which a light-emitting diode signalling a status of the measuring device is inserted, wherein the cylindrical sleeve also has a recess at the side opposite the light-emitting diode, which recess on the one hand, acting as a part of the duct system or air passage, allows pressure compensation and, on the other hand, allows the light-emitting diode to be visible.